Cooler



FIG. 1 is a front right side perspective view of a cooler showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

We claim the ornamental design for a cooler, as shown. 